71802 LLB A5 15x24x5 Bearing ABEC5 angular contact

In standard radial bearings, only 3 or 4 balls make contact during the load, at any given time. In Angular Contact (A/C) bearings, ALL balls are engaged and spread the force over a larger surface area, to decrease friction and minimize wear. Wheel play can be adjusted out of the hub providing a more stable wheel, and making it easier to adjust disc brakes while still spinning freely.

These bearings will perfectly fit inside wheels and bottom brackets. 

If you are not sure which bearing to choose, click here for more information.